CJX2 series AC Contactor is suitable for using in the circuits up to the rated voltage 660V AC50Hz or 60Hz, rated current up to 620A, for making, breaking, frequently starting & controllingthe AC motor. Combined with the auxiliary contact block, timer delay & machine-interlockingdevice etc, it becomes the delay contactor, mechanical interlocking contactor, star-delta starter. With the thermal relay, it is combined into the electromagnetic starter. The product conforms toIEC60947-4-1 stardand.